Selective signaling system and apparatus



Aug. 6, 1935. E. E. KLElNSCHMiDT ET AL 2,010,158

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SELECTIVE SIGNALING SYSTEM AND APPARATUS Filed om. 14, 1930 10Sheets-Sheet 2 I70 I79 QF smer MAGNET /Y 209 r /7/ STOCK SELECTOR 255MAGNET I 96 292 /as Pe/cE /SELECTOI? wsmzr give; Q

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SELECTIVE SIGNALING SYSTEM AND APPARATUS Filed Oct. 14. 1930 10Sheets-Sheet 4 BY LOU/S M P0775 ATTORNEYS Aug. 6, 1935. E. E.KLEINSCHMIDT Er AL 1 SELECTIVE SIGNALING SYSTEM AND APPARATUS Filed Oct.14, 1930 1 0 Sheets-Sheet 5 /6 Y STOCK SELECTOR 4 7 44/ U OVERLAP u/wrEfCf/V/w DAVE/B07272 .mmll INVENTOIZS fDWAEDEKLfl/VSC/IM/DT HOW/02D LKBU/V LOU/S M POT 73 Aug. 6, 1935.

E. E. KLEINSCHMIDT ET AL SELECTIVE SIGNALING SYSTEM AND APPARATUS FiledOct. 14, 1930 10 Sheets-Sheet 6 INVENTO B5 EDWARD E ALf/IVSC/I'M/DTHOWARD L KBUM LOU/3 M P0773 3 ATT EYS 3% E @v mm g- 1935- E. E.KLEINSCHMIDT ET AL 2,010,158

I SELECTIVE SIGNALING SYSTEM AND APPARATUS Filed Oct. 14, 1930 10Sheets-Sheet 7 com: FOR NuMERA'La RELAY I z 3 4 BLANK O O X G u x o x oz x o o o 5 X X 0 Q 4 o x o o I 5 O X X x BLANK O O X X 6 X 0 X- X 7 X oo x 8 x x o x I 9 O X 0 X o o x x o $06 F/s. Z

CODE FOR FRACTIONS RELAY 3 BLANKO o )5 X O 4 X 0 6 .O x V: O X -75 x X ax x 552 a 53/ 52a a I INVENTORS 404 s 3 EDWARD E KLE/MSCfiM/DT HOVVAIZDL If RUM LOU/8 M POTTS Aug. 6, 1935. E. E. KLEINSCHMIDT El AL 2,010,158

SELECTIVE SIGNALING SYSTEM AND APPARATUS l0 Sheets-Shee t 8 Filed Oct.14, 1930 INVENTORS EDWARD E KLE/NSCHM/DT HOWARD 1 MP0 LOU/5 M P0 7.5

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Aug 6, 1935. E. E. KLEINSCHMIDT ET AL" 2,010,158

SELECTIVE SIGNALING SYSTEM AND APPARATUS Filed Oct. 14, 1930 10Sheets-Sheet 9.

E IIIIlIIlllIlII/IIIIIII I will? INVENTORS EDWAQD E/IZEI/VSCHM/DT HOWQPDL KRUM I BY LOU/.5 M P0775 91 ATTORNEY Aug. 6, 1935. E. E. KLEINSCHMIDTET AL 2,010,158

SELECTIVE SIGNALING SYSTEM AND APPARATUS Filed Oct. 14, 1930 10Sheets-Sheet 10 h &

RECEIVER TANK AIR

COMPRESSOR HOWARD L KEUM BY LOU/5 M POTTS ,7 42 ATTORNEYS Patented Aug.6, 1935 smo'rrva SIGNALING srs'mu AND arraaa'rvs Edward E. Kleinsohmidt,Howard L. Krum, and

Louis- M. Potts. Chicago, Ill., asaignors to Teletype Corporation,Chicago, Ill., a corporation of Delaware Application October 14, 1930.Serial No. mass! 1 Claims. (01.177-853) This invention relates toselective signaling systems and is especially adapted to the selectivecontrol of remotely disposed stock and commodities, boards from acentral dispatching station.

The present practice of manually posting stock quotations by attendantshas been rendered impractical by the development of tickers capable ofexceedingly rapid operation. Such manual recordation has proved to beentirely inadequate to keep pace with the increased volume of businessnow being transacted. To handle this large volume of business, automaticmeans are necessary which will indicate the quotations as they arereceived, independently of any manual operation by an attendant.

A primary object of this invention is to adapt the efilcient permutationcode methods of modern printing telegraphs to the operation of quotationboardsto give the necessary speed of operation. However, due to thelarge number of diflerent items in many markets, it is impractical toprovide a permutation code indicator for each digit or even for eachitem to be quoted commercially.

and in accordance with the present invention, quotation boards aretherefore provided in which a large number of indicators can becontrolled from a single permutation device.

Another object of this invention is to provide a selective signalingsystem for indicating quotations at a plurality of remote stations underthe control of a central dispatching station, which is simple, reliableand accurate.

Due to the very heavy trafilc to be handled by such systems, it is animportant object of this invention to provide-novel overlap arrangementsat the transmitting and receiving stations, whereby a greater amount ofsignal line time may be productively employed.

This invention further provides a stock quotation distribution systememploying electrically controlled and selectively operated pneumatic'means comprising novel electropneumatic selecting devices operable withthe eiilciency and reliability of recent telegraph selectors.

It is customary to designate on the stock board the attributes orindexes of each particular stock. such as "close". open", high, low,and"last". A further object of this invention is to provide novelcircuit arrangements for selectively operating simultaneously variantcombinations of indexes or attributes of the stock items, to be quoted.

Further objects of this invention reside in the provision of noveltransmitting, selecting and reoeiving apparatus in telegraph systems.which are particularly adapted for automatic distribution of stock andlike quotations.

Other objects of this invention are such as will be attained by thecombination of features hereinafter set forth and as pointed out in theappended claims.

In the drawings: I

Figure 1 is a diagrammatic view of the circuits and apparatus for atransmitting distributing arrangement, embodying the invention, andhaving a single stop segment and a large number of code combinationsegments used in connection with a transmitter having a lesser number oftransmitting contacts.

Figure 2 is a diagrammatic view of the circuits and apparatus for areceiving distributing arrangement having a single start segment and alarge number of code combination segments used in connection with theoverlap units, adapted to operate with the transmitter of Figure 1.

Figure 3 is a continuation of Figure 2 and represents in a compositeview the stock selector, timing unit, and two stock indicator unitstogether with the operating circuit therefor.

Figure 4 is also a continuation of Figure 2 and represents adiagrammatic view of the price selecting unit together with theoperating circuit therefor.

Figure 4a shows a sample section tape used to control the transmitter.

Figure 5 is a partial elevation and partial section of the code discselector.

Figure 6 is a cross section of the code disc selector taken on line 6-6in Figure 5.

Figure 7 is a cross section of the code disc se lector taken on line'I-l in Figure 5.

Figure 8 is a front elevation of a portion of a preferred form of stockboard.

Figure 9 is a transverse section of a preferred form of stock board.

Figure 10 is a front elevation of the preferred form of stock indicatorunit.

Figure 11 is a perspective of the stock indicator unit, shown in Figure10, as viewed from the rear.

Figure 12 is a section of the stock indicator unit taken on line i2--l2in Figure 10.

Figure 13 is a perspective of the indicator drum with parts broken away.

Figure 14 is a cross section taken on line II- II in Figure 12.

Figure 15 is a detail of the indicator drum un- I arrangement used inconnection with a modified form of; indicator of theelectro-magnetically operated type shown in Figure 18.

Figure 17 is a continuation of Figure 16.

Figure 18 is a perspective of a modified form of indicator of theelectromagnetically operated t pe.

Figure 19 is a fragmental view of a modified form of indicator drum ofthe cross magnetic field type.

Figures 20 and 21 are schematic diagrams showing the field windings oftwo forms of cross magnetic field indicator drums shown in Figure 19.

Figures 22 and 23 are vector diagrams showing the directions of theresultant field in the cross magnetic field indicator drum shown inFigure 19.

Figure 24 represents a code used in connection with the cross magneticfield type of indicator drum shown in Figure 19.

Figure 25 is a diagram of the price selector together with the operatingcircuit therefor used in connection with the cross magnetic field typeof indicator drum.

Figure 26 is a diagram of a modified form of price selector of therevertive type together with the operating circuit therefor.

Figure 27 is a perspective of a modified form of stock indicator unit ofthe pneumatic type, with certain parts broken away to show more clearlythe details thereof.

Figure 28 is afragmental plan showing the details of the indicator drumoperating mechanism used in connection with the stock unit shown inFigure 27.

Figures 29 and 30 are longitudinal sectional "views of the aggregatemotion device employed in connection with the stock unit shown in Figure27.

Figure 31 is a diagram of electrical circuits and pneumatic equipmentfor a receiving distributing arrangement used in connection with themodified form of stock indicator unit shown in Figure 27.

Transmitting station In the stock quotation distribution system hereindisclosed, there is indicated for purposes of illustration (see Figurel) the transmission of the stock quotation initiated through the mediumof a perforated tape. It is understood that any other medium, such asfor instance, direct keyboard operation may be employed. Perforated tapeE (Figure 4a) in the present embodiment of this invention has groups ofperforations, the first-three successive groups of cross perforationsrepresenting letter signals; the next group representing the nature ofthe stock, whether common, or first, second or third preferred; the nextgroup representing the index code; and the last three representing thenumeral codes which constitute the price of the stock or commodity,representing the tens, units and fractions of the particular quotation.

Associated with the fractions perforations there is perforated in everycase, an additional hole l0, which is not perforated in any otherposition. If the tape is a five-hole cross-perforated type, thisadditional hole will be in the sixth line. This perforation does notcontrol the transmission of a code combination signal as do the otherperforations but does control the energization of a tape feed magnet, soas to locally insure message synchronism between the tape and thetransmitting distributor brush, as will hereinafter appear. Any wellknown form of automatic telegraph transmitter may be used for thispurpose such as is to be described for purposes of illustration in thefollowing.

Tape is fed to the automatic transmitter, Figure 1, by means of feedwheel 2, the pins of which engage the central row of feed porforationsin the tape. Feed wheel 2 is rotated in a step-by-step manner to bedescribed in detail hereinafter. In operative relation with theperforations positioned across tape i are six individual feeler levers 3to 8 all pivotally mounted on rod 9 about which they are urged in acounter-clockwise direction by individual springs H. Although the leversare shown diagrammatically as positioned beneath each other, it will beunderstood that this is mere- 1y for purpose of clarity and that inpractice the levers are in a horizontal row on a common pivot 9 and inoperative relation with the tape. Each feeler lever is provided with anintegral feeler pin l2 which, when the associated lever is moved in acounter-clockwise direction about pivot 9, engages the surface of tape Ior enters a perforation therein. Each of the levers 3 to 8 is alsoprovided with a contact extension member l3 which is arranged to movebetween lower and upper contacts in accordance with movements of thefeeler levers.

Extending across the top of levers 3 to 8 is resetting bail M which isoperably connected to armature of resetting electromagnet it, whicharmature normally tends torotate in a counterclockwise sense about itspivot il due to spring l8. Bail M is also secured at one end totape-feed lever is pivoted at 2i. Pivoted to the free end of lever is isfeed pawl 22 which is held into operative engagement with the teeth ofratchet wheel .23 by spring 2%. Feed wheel 2, ratchet wheel 23, anddetent wheel 25 are mounted on a common shaft 25. Detent wheel 25 isadapted to co-act with a jockey roller mounted on a spring actuatedlever 2i to maintain the tape in set position.

\Feeler levers 3 to E3 and tape feed lever is are adapted to beoscillated up and down periodically by the action of magnet it upon bailiii, as will presently appear. As bail iii moves upwardly, lever 89 isrocked about its pivot 2i raising feed pawl 22 to engage the next toothon ratchet wheel 23. During downward movement of bail l4 ratchet wheel23 and, accordingly, feed wheel 2 are moved one step to present asucceeding row of perforations to feelers i2. It will be noted that thismovement of the tape occurs after the feelers are out of engagement withthe tape, rotation of the feed wheel 2 occurring during the downwardmovement of bail M after the feelers have moved out of engagement withthe perforations presented thereto. This delayed feeding action preventstearing of the perforations by feeler pins it.

When bail i8 is again moved upward feelers i2 are permitted to moveupwardly under the action of their individual springs H. Those feelerpins I2 which are beneath a perforation in the tape will. then continueto move into the perforation until the associated contactor i3 engagesits upper contact. If no perforation is disposed above the feeler pinI2, the movement of said feeler pin will thus be limited and itsassociated contactor 83 will remain aganst the lower contact.

Contactor iii of the first feeler lever 3 controls a circuit overconductors 28 and 29 to the upper and lower windings respectively ofpolar relay BI.

Polar relay ll comprises an armature 82 which moves'between its upperand lower contacts and exten s a circuit from conductor ll for theresettin magnet it over conductor 84 or conductor 38 to segments on thetransmitting distributor, as

, will be described hereinafter.

Contactors ll of the other feeler levers I to I extend circuits to theupper and lower windings respectively of storage relays 36 to 40, which,as will be described hereinafter, are energized in accordance with thecooperation of feelers! with perforations in tape I and operatetheirrespective armatures I to 45. The upper and lower contacts of thesearmatures are multiplied and connected respectively to the negative andpositive sides of current sources 20 and and circuits therefrom, andover armatures ll to 48 extend over conductors 48 to 50 respectively tothe first to fifth code combination contacts on distribution ring II. Itwill be noted that the same conductors are multipled to each succeedinggroup of five segments on the ring ll, being connected in successiveorder for the first three groups of five segments.

Ring 5i comprises first a stop segment which is permanently connected tonegative polarity and second a start segment which is permanentlyconnected to positive polarity. Ring II is bridged with a solid ring 52by brushes 53 and 54 carried on distributor arm 55. Arm 5! in additioncarries brushes 56 and 51 which bridge solid ring 58 and segmented ring59. Solid ring 58, it will be noted, is connected to positive polarity,and the first segment on distributor ring 58 is connected over conductor34 to the upper contact of armature 32 of relay 3|.

The segments on ring 58 are in groups of five, the first three groupseach comprising three contact segments followed by two blank segments.Second contact on segmented ring I! is multipled with the second contactof the first three groups of five and extends over conductor ii to thefeeler levers I to 8. The third segment is multipled with the thirdsegment of the first three groups of segments and extends over theconductor 62 to feeler levers I and I. It will also be noted that thefirst segments of each of the groups of segments starting with thesecond group are multipled to each other and extend over conductor 35 tothe lower contact of the armature 32, of relay ll.

Arm 5! is connected through friction clutch Bl to shaft 84 of motor 85.Spring 66 engaging shoulder '81 on shaft 64 forces friction clutch 63into engagement with distributor arm 55.

Distributor arm I! is normally held from rotation by armature 68associated with start magnet 00 and in this position a stop-current istransmitted for the distant receiver or receivers from negative polarityover the first or stop segment of distributor ring II, brushes II and54, solid ring I? and line wire 'II to the receiving relay of thedistant receiving apparatus. There is also held closed at this time acircuit to energize resetting magnet it over the wire 33, armature 32,wire 3, brush 61, upper segment of ring 0, brush it and ring 58 topositive.

Start magnet 89 is controlled by tape control arm 12 which in turn isoperated by slack in the tape. Tape arm I! is shown in Figure 1 in itslatched position, being so held by detent member II, which position isassumed manually. When tape arm 1: assumes its unlatched positionit'tends to close contact II when the slackness of the tape issufficient to permit, and when the tape becomes taut it tends to breakcontact 14 thus automatically arresting operation of the transmitteruntil the tape again becomes slack. However, it is intended that thetautness of the tape shall not throw the tape arm 12 sufilciently incounter-clockwise direction, Figure 1, to its latched position, whichposition, as previously stated, can only be assumed manually. when thearm 12 is in its unlatched position and the tape is slack, contact 14 isclosed and an energizing circuit for start magnet 89 is completed (whenmanually operated main switch II is closed) from positive polaritythrough switch I! over wires It and 11 through winding of magnet 00,over wire ll through contact I4 to ground. Thus energization of magnet89 tends to move the armature II from the path of the distributor arm5!. When the tape becomes taut contact I4 is opened and armature 8| ofstart magnet ll moves into the path of the distributor arm 58.

Assuming the tape to be slack, magnet II is energized and armature 88 isoperated to move out of the path of distributor arm 5!. Brush 53 beingat this time in engagement with the first segment on distributor II, a.stop impulse. of negative polarity is impressed upon signalling line 1ias traced above.

Now, when brush 53 moves into engagement with the second or startsegment, a positive or start impulse is impressed upon conductor Ii overthe circuit traced above and receiving distributors connected toconductor H to be described more fully hereinafter are started intooperation.

The last previous code combination on the tape, having embodied a sixthperforation i0, as previously mentioned, feeler i2 of feeler lever Imoved to its upper position and upper winding of relay It was energizedby way of the second segment on ring 59, shifting tongue 32 to theposition shown in Figure 1 and preparing a circuit for magnet i6.Simultaneously with the brush 53 on the first segment, brush 51 is alsoon the first segment of the first group of segments on segmented ring 59and a circuit is completed for resetting magnet it from positive.polarity through distributor ring 58, over brushes 56 and 11, overconductor 34, through armature 32 which is now in its upper position,over conductor ll, through winding of magnet it to ground.

As a result of energization of magnet i6, bail i4 is pulled downwardlymoving feeler levers 3 to 0 from the perforated tape and at the sametime moving feeding lever ID to feed the tape one step as previouslydescribed. As brushes 53 and 51 move to their related second segments,brush 51 breaks from the first segment of the first group of segmentsonring 58, magnet i6 is de-energized and feeler levers I to 8 move intothe code combination perforations with which they are at that time inoperative relation. At the same time, brush I! being on the secondsegment, current of positive polarity is impressed from the ring 50through the second segment of ring ll, conductor 6i, feeler levers 8 to.6, and, depending upon whether the contactors of feelers l, l and 6 arein their upper or lower position, the polar relays 38 to 38 will beenergized to in turn operate their armatures I to 43 to either theirupper or lower contacts, respectively. The sixth feeler lever will notfind a hole at this time, and the armature 32 will move to its lowercontact, thus connecting resetting magnet I for subsequent operationautomatically after each group of perforations has been transmitted.

While brush It is on the first segment of ring Bl, brush 1 is on thefirst segment of the first group of segments of ring 59. Thus whilebrush 53 is transmitting the stop signal from negative to line H brush51 is charging magnet I6.

While brush 53 is moving over the second segment of ring 5|, brush 5'!is on the second segment of the first group of segments of ring 59.Brush 53 is then transmitting the start signal from positive battery tothe line H and brush BI is transferring the 1st, 2nd, 3rd, and 6th tapesignals of the code combinations being transmitted from the tape tostoring relays 88, 3?, 38 and 8| respectively, the feelers having riseninto the tape by release of magnet it'in time to effect this function.This impresses signaling currents on the third, fourth and fifthsegments of the ring M or segments 8, 2 and 3 of the first group inreadiness for brush 53.

While brush 53 is moving over the third segment or segment i of ring 5!,brush 51 is on the third segment of the first group of segments of ring59. Brush E53 is transmitting the code signal either positive ornegative from armature ll over wire 48 to line it and brush 5'8 istransferring the fourth and fifth tape signals of the combination beingtransmitted from the tape to the storing relays 89 and it, respectively,since the third segment of ring 59 is connected by wire 62 to feelerlevers i and t. This prepares the sixth and seventh segments, segmentsIt and E5, of ring 59 in readiness for brush it, since armatures and 35will now impress positive or negative currents on segments d and 5.

While brush 53 is moving over the fourth and fifth segments of ring 59,segments 2 and 8 transmitting the code signals from armatures i2 and 13over wires 4i? and st to the line ii, brush 5? is ineffective, since itis passing over a blank section of ring 59.

While brush 53 is moving over the sixth segment, segment 3 of ring 5i,brush 5? is on the first segment of the second group of segments of ring59. Brush 53 is transmitting the code signal from the armature Ml overthe wire is to the line H and brush 5? completes an energizing circuitfor magnet it to draw feelers 92 out of the tape and to step the tapeforward to render effective the second code of perforations in thecycle. Magnet it is energized over wire 33, armature 32, lower contactand wire 35 to the first segment of the second group on the ring 59,itbeing remembered that armature 32 moved to its lower contact whencontact 83 of feeler lever 3 engaged its lower contact. When brush 5?leaves the first segment of the second group, magnet it is de-energizedand spring 98 retracts bar it so that all feeler levers rise to engagewith another code combination of perforations. Since there is no sixthperforation for feeler lever 3 armature 32 of magnet 3i remains down.

While brush 53 is moving over the seventh segment, segment 5 of ring 5!,brush 51 is on the second segment of the second group of segments ofring 59. Brush 53 is transmitting the code signal from the armature 45over wire 50, to line H and brush 51 is transferring the first, second,and third tape-hole signals from the tape to the storing relays 36, 31,and 38 respectively, feelers l2 having risen into the tape by release ofmagnet Hi. This prepares segments 6, I and 8 of ring 5| in readiness forbrush 53.

While brush 53 is moving over segment 6 of the second group of segmentsof ring ll. Brush i3 is transmitting the code signal from armature 4|over wire 48 to line H, and brush 8! is transferring the fourth andfifth tape-hole signals as determined by feeler levers I and B from thetape to storing relays 39 and 40 respectively. This prepares segments 9and II of ring 5| in readiness for brush 53.

The sequence will repeat for the third group of segments and brush 5!always will transfer the tape record to the storing relays and prepareany segment of ring 5| before brush 53 reaches the segment. It is notedthat the first two segments marked 8 and the succeeding segments marked9 to IE on ring 5! control in turn the stop signal, the start signal,and then three groups of signals comprising five signals in each group.The last mentioned three groups of signals compose the letter codecombination representing the commercial stock symbol of the stockquotation to be propagated.

Segments marked it and ill on ring at control the signals composing thecode combinations relating to the nature of the stools, such as common,preferred, class A or the like, which code combinations comprise twosignals or impulses whose nature is governed by storing relays 3 and 69.

When brush 5i completes contact with the first fifteen segments on ringthus completing the three selected code combinations, designating thestock, contact with the sixteenth segment on ring to operates theresetting magnet it to return the feeler levers 3 to 8 to initialposition and to set the tape forward for the next group of perforations.When brush 51] engages the seventeenth segment on ring 59, storagerelays 39 and 40 are operated in accordance with the setting of feelerlevers l and 8, thus preparing segments 06 and ill on ring 5!! forengagement by brush 53. When brush it engages segments 86 and ii,positive or negative impulses are transmitted over the outgoing line itin accordance with the previous setting of storage magnets 39 and (it.These outgoing signals will actuate the receivers to indicate whetherthe stock to be quoted is common, preferred, class A or the like.

Segments i B to it on ring 55 control the transmission of signalscomposing the'code combinations to determine the range or index of thestock such as close, open, high, low, and last, which code combinationscomprise four signals or impulses whose nature is governed by storagerelays 36, 37, 38 and 39. When brush 5?? engages the eighteenth segmentof ring 59, resetting magnet i6 is operated to reset the feeler levers 3to 8, and to step the tape forward for the code combination controllingthe open, high, low or the like of the stock. Engagement of brush 5'!with the nineteenth segment of ring 59 then operates storage relays 35,37 and 38' in accordance with the setting of the feeler levers andengagement with the twentieth segment operates the relays 39 and B0.

Brush 53 successively engages segments i8, i9, 20 and 2! to'transmit thesettings of storage relays 36, 31, 38, 39 through the line H.

The next two groups of segments marked 22 to 25, and 26 to 29 on ring5!, control the signals composing the code combinations relating to thetens and units integers of the quotation, which code combinationscomprise four signals or impulses whose nature is governed by thestoring ring 5|, brush 5'! is on the third segment oirelays 31, 38, 39and 40. The last group of segments marked 88, 3| and 32 control thesignals constituting the code combinations pertaining to the fractionsnumeral of the quotation, which code combinations comprise three signalsor impulses whose nature is governed by the storing relays 38, 39 and48. In each instance the segments on ring are prepared for brush 53 bytheprevious setting of storing relays 35 to 48, brush 51 being alwaysahead of brush 53.

It will be recalled that associated with the fractions or last codecombination to be transmitted, there is perforated in every case, asixth hole, which is not perforated in any other position. Accordingly,when brush 51 moves over the first segment of thelast group, magnet I8energizes, feeding the tape to the next position; upon de-energizationof magnet I8 and movement of feeler I2 of feeler lever 8 into the sixthperforation of the tape, a circuit is prepared for upper coil of relay 3I. As brush 51 moves to the second contact or segment of the last group,current of positive polarity is impressed on conductor 8| which flowsthrough feeler lever 8 to the upper winding of relay 3| and armature 32will be moved to engage its upper contact as shown (Figure 1).

As will now be clear, the tape is moved one step as the brushes movefrom one to the succeeding group of segments. To insure messagesynchronism between the tape and the distributor brush, energization ofmagnet I8, upon which stepping of the tape and therefore operationdepends, is made to respond, once for each message group of codecombinations, to .an impulse over a different circuit from that to whichit responds at the remaining stepping positions in the message group.

In this arrangement it will be noted that if the tape becomes tautenough to move lever I2 and open the contact of the circuit for magnet88, the code combinations will continue to be transmitted until brusharm 55 reaches the first position shown whercat it will be engaged bythe armature 68. Furthermore, in the event that the tape is placed inthe transmitter in the wrong position and the distributor is operated,it will step along until it comes to a position having the sixthperforation whereupon it will fail to step until the distributor reachesthe position shown in Figure 1 and will be automatically brought to thecorrect position with reference to the distributor regardless of how itmay have originally been placed in the transmitter. It also will benoted that the s gnals are stored in two groups, the transfer takingplace at different times for the two groups so that an overlap isprovided which allows time for the stepping of the tape although thesuccessive segments corresponding to the last pulse of one single codecombination and to the firstpulse of the succeeding single codecombination have no extra segments between them; that is, the tape maybe operated to the next position during the period while the precedingstored code combination is still being transmitted and may thus beconditioned for the next code combination during this interval.

The speed of motor 85 is governed by a vibrating fork 19 operating asfollows: Motor55 is provided with field winding 88 connected to wire I8and having its opposite end grounded. Upon the same shaft with thearmature of motor 85 is an alternating current motor 8| connectedthrough lamp 82 to the secondary of transformer 88. The primary of thistransformer is connected to contacts 84 and 85 adapted to be engaged byspring 88 mounted on one tine of tuning fork I8, said spring beingconnected to ground as shown.

Magnet 81 is provided for vibrating fork I8 and is periodicallyconnected in aclosed circuit by contact spring 88 on the opposite tineof the tuning fork. When the tines of the fork are spread apart,.contactor'88 engages contact 84, whereby current can pass from positiveover closed switch I5 to the center of the secondary of transformer 83and to ground. The circuit for magnet 81 is thus broken and the tines ofthe fork will return to their closed position, and spring 88 engagescontact 85 and current flows in the opposite direction in the secondaryof transformer 83. In this manner periodical reversals of current areproduced in the primary of transformer 83, and this current inducesalternating currents of predetermined frequency in the primary of thetransformer which flows through the alternating current motor 8|.

As is well known, the tines of fork I8 may be made to vibrate at apredetermined frequency and are then kept vibrating at this frequency bythe magnet 81. Accordingly current of a fixed fre-- 'quency flowsthrough the winding of motor II to produce rotation in a well knownmanner at a speed determined by the frequency of the current flowingtherethrough. In this manner the motor 85 is kept rotating at a constantspeed, the actual power for driving the shaft upon which the motor ismounted being supplied by the direct current winding of said motor. Bythis connection an almost constant rotating speed for the distributor isobtained. The flickering of lamp 82 may be observed, and will indicatethat the speed at which the motor is rotating is not correct.

In order to start the vibrating fork in motion, two starting magnets 8|are provided, connected in parallel to a circuit which serially includesa magnet 82 having. an armature 83.

From an inspection of the circuit, it will be apparent that when switchI5 is closed a current may pass through closed contact of armature 88 tothe starting magnets 8| and to ground. The tines of fork I8 will thus bepulled apart to start the same in vibration and initiate the operationof the control. Current also passes through electro-magnet 82 to movearmature 83, thus at once breaking the starting circuit so that themagnet 81 may continue vibrations of the fork.

Associated with the distributor motor'55, Figure 1, is a loadcompensating means comprising a relay I88 and resistance I I8, whichwill now be described. It is understood that when the transmittingdistributor is at rest, switches I4 and I5 are open, the motor 85 is notrunning, and brush arm 55 is stopped by armature 88.

Assuming that switch I5 is closed in order to initiate operation of thetransmitting distributor, an energizing circuit for magnet I8 iscompleted from positive, ring 58, brushes 58 and 51, first se ment onring '58, over wire 34, armature 32, wire 38, through winding of magnetI8 to negative ground. Magnet I88 is energized from positive, ring 58,brushes 58 and 51, first segment of ring 58, wire II I, winding of relayI08 to ground. Energization of relay I88 causes armature I I2 to bepulled up to close contact I I4. simultaneously with theenergization ofrelay I88 9. power circuit for motor 85 is completed from positivethrough switch I5 over wires 18 and I I5, through motor 85, over wires II8 and III, over armature II2, through contact I, over wire I I3 toground. Motor 85 is at this time tending to rotate distributor arm 55against the resistance of friction clutch 83, which is thus imposing aload on the motor, since arm is restrained from rotation by armature 68.

Now, when arm 55 is released for rotation, which, is initiated, aspreviously described, when contact I4 associated with tape arm I2 isclosed thus causing energization of start magnet 69 to actuate armature68, the load on the motor imposed by the friction clutch will besuddenly lessened and the motor would at once tend to speed up suddenly,carrying brushes 53 and 51 across the initial segments too quickly. Toprevent this occurrence, there is provided the above mentionedcompensating means, which consists essentially in inserting a resistanceadjusted to compensate for the diiferenceof load in the motor circuitsubstantially simultaneously with the release of brush arm 55, in thefollowing manner.

When contact 14 is closed magnet 53 becomes energized and rotation ofbrush arm 55 is initiated. As soon as brush 51 moves off the firstsegment of ring 59, relay I09 becomes de-energized, thus releasingarmature H2 and breaking the circuit through contact I I4. The motorcurrent thus will be compelled to flow through the resistance III! toground, reducing the motor current, thereby compensating for the loadimposed by. the friction clutch, which load is removed when the arm 55is released for movement.

Initiation of transmission may be accomplished by manually moving arm I2against tension of detent I3 whereby contact I4 is closed. This willoperate the start magnet 33 to allow rotation of the distributor arm 55in the manner hereinbefore described. If at any time during transmissionthe tape become sufllciently taut, arm I2 will be raised to open contactI4 and the distributor will be stopped at the completion of the group ofsignals being transmitted, or when distributor arm 55 arrives at theposition shown inFigure 1. This movement of arm I2 by the tape, however,is not suflicient to overcome the detent 13 so that when the tape againbecomes slack contact 14 is at once closed and the transmission ofsignals is resumed. If it is desired to suspend operation, arm I2 may bemanually lifted to the position shown in Figure 1 whereby detent I3 willmaintain contact I4 open.

I are of both positive and negative polarity; are

received from the transmitting station over line wire II and passthrough receiving relay H3, which is of the polar type of any well knownconstruction, thence either to ground or to one or more receivingstations. The speed of rotation of motor I55 and consequently of brusharm II9 of the receiving distributor is controlled by a vibrating forkI9 as in the case of the transmitting distributor, shown in Figure 1, towhich reference may be had for a full understanding of like equipmentfor which the description is not repeated in detail.

When switch I5 is closed, a power circuit for motor 65 is completed frompositive through switch I5, over wire I20, through winding of' motor65', over wire II6, thence either through resistance III), and over wireI2I to ground, or

clutch combined with the fact that arm II 9 is restrained from rotationby armature I2I associated with start magnet I22. As previously setforth, when the transmitting apparatus, shown in Figure 1, is in itsstop position, line II is normally charged with marking or negativecurrent. Armature I23 of polar relay II8, Figure 2, thus is caused toengage the upper contact as shown.

Carried on distributor arm II8 are brushes I24 and I25, which areelectrically connected and are adapted to bridge rings I23 and I21 ofthe receiving distributor. Also carried on arm II 9 are brushes I28 andI29 electrically connected and adapted to bridge rings I3I and I32. As

previously described in connection with the transmitting distributor,when brush arm H9 is released for rotation, as will presently appear, itwill tend to rotate with an initial sudden increase of speed due to theinstantaneous decrease of the load or resistance imposed by the frictionclutch. To prevent this occurrence, there is also provided aloadcompensating means similar in character and efl'ect to that previouslydescribed. Thus when brush arm II! is in its stop position and armatureI23 of polar relay engages the upper contact, an energizing circuit forrelay I09 is completed from positive battery through the winding ofrelay I09, over wire I33. through the first segment of ring I26, throughbrushes I24 and I25, over segment I2I, wire I34 through said uppercontact and polar relay armature I23 toground.

When the receiving apparatus is in this condition armature I I2 ispulled up and a path through contact 4' is closed to complete one of thepreviously mentioned alternate power circuits for motor 65'. Now, whenarm H9 is released for rotation by the reception of a start impulse, aswill presently appear, relay I 03' will become deenergized when polarrelay armature I23 engages the lower contact, thus breaking the circuitthrough the upper contact. Armature 2' then will become released andresistance III! will be inserted in the power circuit for motor 55,thereby compensating for the load justremoved from friction clutch 52'.

To initiate rotation of distributor arm IIQ, Figure 2, a startingimpulse of positive polarity is impressed on line II, as hereinbeforedescribed, which energizes polar relay II8 causing its associatedarmature I23 to move to the lower contact thus completing an energizingcircuit for start magnet I22 from positive battery, through winding ofmagnet I22, over wire I35, through cam operated contact I36, over wireI31, lower contact of polar relay II8, over associated armature I23 toground. Energization of magnet I22 pulls up its armature I2I to releasebrush arm I I9 for rotation.

Mounted on distributor shaft and rotatable therewith is contactoperating cam I38 adapted to close contact I38 only when brush arm II9is in its upper or stop position. Thus it is clear that start magnet I22can become energized only once in every revolution of the distributorand at a fixed point in the revolution.

Signal impulses as they are received over line II and through polarrelay II8 cause the armaoverlap units I and I42 respectively in thefollowing manner.

If the first impulse after the start impulse is of negative or markingnature an energizing circuit for selector magnet I99 in overlap unit Iis completed from positive battery through winding of selector magnetI39, over wire I49, through segment marked I on ring I26, throughbrushes I24 and I25, (which are now cooperating with segment marked I)ring I21, over wire I34 and armature I23 to ground. a

'The other selector magnets I39 and I39 in the overlap units MI and I42are similarly successively affected, as brush arm I I9 makes onerevolution if marking impulses are received; but when spacing impulsesare received the energizing circuits for magnets I39 and I39, previouslydescribed, are broken at the upper contact of polar relay armature I23and consequently no selection is made in the overlap unit.

Briefly, the overlap units HI and I42 each comprise means for storingthe received stock quotation to provide a complete overlap of onemessage, so that a second message can be received simultaneously withthe propagation of the previously received message to the stockquotation board. Essentially,. selector magnets I99 and I39 areenergized in accordance with the received code combinations and effectthrough mechanical means the closing of associated storing contacts, aswill now be described.

It is to be noted that segments'I to I1 on ring I26 are eachelectrically connected to associated selector magnets I39 in overlapunit I over conductors such as I49. Likewise, segments I3v to 32 areelectrically connected to associated selector magnets I99 in overlapunit I42. That part of the complete stock quotation message whichpertains to the name of the stock and its nature (as common" orpreferred") is stored up in overlap unit I; and that part pertaining tothe price and index of the stock is stored up in overlap unit I42.

Having reference to Figure 2, we have seen how energization of selectormagnets I39 are effected. When any selector magnet I99 or I99 isenergized it attracts its armature which is secured to one arm of latchmember I44 or I44 individual thereto and causes latch I44 or I44 torotate slightly in a counter clockwise direction about its pivot I45 orI45 against the action of retractile spring I46 or I46. This movement ofeach latch I44 or I44 permits its associated selector lever I41 or I41to become unlatched therefrom, thereby allowing the associated lever I41or I41 to rotate in a counter-clockwise direction about its pivot I 49or I49 due to the action of tension spring I49 or I49 individualthereto.

Each selector lever I41 and I41 is provided with an arm adapted toco-act with arm I5I or I5I of contact lever I52 or I52 associatedtherewith, so that when a lever I41 or I41 is actuated, as previouslydescribed, associated contact lever I52 or I52 is caused to rotate in aclockwise sense about its pivot I53 or I53 against the action ofretractile spring '54 or I54, until its undercut notch I55 or I55 isdisposed above associated contact bail blade I56 or I56. Notch I55 orI55 is adapted to receive contact bail blade I56 or I56 when the latteris actuated, as will presently appear. Also, contact bail blade. I56 orI56 is adapted to span all of the seventeen contact levers I52 or I52.

Selector magnets I99 of overlap unit I are the first in a complete cycleto become energized 'shown) and immediately after brush I24 hastraversed the seventeen segments controlling magnets I39 in unit I,brush I26 wipes over. segment I51 on ring I3I thus completing'anenergizing circuit for start magnet I53 in overlap unit I from posi tivebattery through distributor ring I32, brushes I29 and I26, segment I51,over wire I59, through winding of magnet I53 to ground.

Energization of magnet I56 tends to pull its associated armature I6l outof engagement with stop cam I62 secured to drive shaft I63 to initiaterotation of said shaft, which is operably connected to a motor or otherdriving means (not Secured to shaft I63 is the contact bail operatingcam I64, which is adapted to coact with a follower I65 on lever I66, towhich lever bail blade I56 is secured. Clockwise rotation is imparted bycam I64 to lever I66 about its pivot I61 to elevate bail blade I56.Blade I56 in its upward movement is adapted to engage the undercutnotches 'I55 of those selectively operated contact levers I52, to carrysaid contact levers upwardly, which movement is permitted by slottedhole I69. This vertical movement causes the closing of associatedstoring contacts I69 to cflect energization of individual selectormagnets such as I10 in the stock selecting unit I, Figure 3, frompositive battery, common conductor I99, through winding of individualmagnets such as I19, over wires such as I12, through contact such as I69(Figure 2) to ground. The eflect of the energization of individualselector magnets I19 will be described hereinafter.

Also secured to driving shaft I63 is reset bail cam I19 adapted toco-act with follower on reset bail lever I14, to the end of which issecured reset bail I15 fashioned to span all the individual selectorlevers I 41. After a predetermined interval in the rotation of cam I19,lever I14 is released for counter-clockwise motion under the tension ofspring I16. This counter-clockwise motion of reset bail lever I14imparts through reset bail I15 clockwise rotation to all of thepreviously selected selector levers I41 so that said selector leverswill. again become latched by detent levers I44. After having reset theselected selector levers I41, reset bail I15 is again returned to itsinitial position by cam I19, cam I64 returns to its initial positionreleasing contact levers I52 which return to initial positions, andlatch I6I stops shaft I63 in the position of Figure 2 ready for asubsequent operation.

As brush I24 traverses the segments I8 to 32 on. ring I26 theenergization of selector magnets I39 in overlap unit I42 is selectivelydetermined to effect the setting of their associated contact levers I52.When the brush I24 passes over the last two or three of this lastmentioned series of segments, brush I28 is in contactual relation withsegment I11 of ring I3I to complete an energizing circuit for startmagnets I18 and I19 in overlap unit I42 and stock selector I1I,respectively, from positive battery, through ring I32, brushes I29 andI28, segment I11, over wire IBI, through winding of magnet I'i8. overwire I82, through winding of magnet I19 (Figure 3) toground.Energization of magnet I18 attracts armature I6I releasing shaft I63similar to shaft I63, for rotation to close the selected ones of storingcontacts I83 through operation of bail I56, and to thereafter restorereleased latches I44 under influence of cam I13 and bail I15 beforeshaft I63 comes to rest by engagement of the shoulder of cam I62 withthe end of armature I6I in the manner above setforth in connection withthe operation of parts I56 to I15.

The effect of energizing start magnet I10 will presently appear when thestock selecting unit I'll, Figure 3 is described. The overlap unit Iis'ipperated before unit I42 for the reason that thezienergization ofstock selector magnets I70 must have been selectively determined beforethe initiation of operation of stock selector unit Hi. It is noted thatthe mechanical operations of overlap unit M2 and stock selector ill areinitiated simultaneously.

The effect of energizing start magnet H8 is similar to that followingthe energization of magnet I58 in overlap unit Mi and hereinbeforedescribed. However, the closing of individual storing contacts E03complete energizing circuits for individual selector magnets wt in priceselecting unit I05, Figure 4, from positive battery through winding ofselector magnets i844, over'wire its, through contacts 83 to ground. Theefiect of energizing individual selector magnets te l in the price andindex selecting unit 505 to selectively determine the priceto beexhibited on the stock quotation board will appear subsequently whenunit 35 is described.

Mounted in overlap unit M2 are tg contacts lBl and W8 which are operatedby cams itii and IN, respectively, which cams are securely mounted onshaft N2 in turn operably connected in any suitable manner to maindriving shaft I63. Contact it? is electrically connected to start magnetits in unit 585 (Figure 4) and is adapted when closed to complete anenergizing circuit for said magnet from positive battery through windingmagnet 9% over wire 6%, through contact ml to ground. The sheet of theenergizationof start magnet m3 is to initiate the mechanical operationof the price selecting unit 25 as will hereinafter appear.

Contact M38 is electrically connected to the start magnet M5 in thetiming unit 1%, Figure 3, and is adapted when closed to complete anenergizing circuit for said magnet from positive battery through windingof magnet H5, over wire ltll, through contact I88 to ground. The effectof the energization of the start magnet 895 is to initiate operation oftiming unit as will become apparent hereinafter.

The cam M9 for contacts it?! is so timed that these contacts are closedimmediately after selected contacts I83 have been closed by bail E56, tothus operate start magnet 893 immediately after the magnets llli havemoved levers 295 to their new positions. Cam lQi simultaneously closescontacts I88 to operate start magnet 33% of timing unit Hi at this time.

Stock selector The stool: selecting unit ili, Figure 3, comprises aframe (not shown) in which are mounted a series of slidable permutationletter code bars 20B. In the present instance, there are seventeen suchbars 2M, one individual to each unit of the three five-unit codecombinations utilized to select the stocks the designation for which iscomposed of three letters, and two preferred stock letter bars, one bar263i being controlled by each magnet 33% and its contact I69 as willmore fully hereinafter appear. Letter code or selector bars 2!" areunder tension to the left (as viewed in Figure 3) by individual springs202, each secured to its associated bar and to the framework. At one endof each letter bar 20! is a spring-pressed selector lever 2&3 pivoted oncommon shaft 2M and normally held in an unoperated position byengagement with a notch 205 in latch member 206, similar to the latch lin the overlap unit, and which is urged counter-clockwise about itspivot by spring 201. Latches 206 pivoted on common shaft 208 are urgedin a clockwisedirection by the springs 209. when one lever 203 is heldby its detent 206 in its unoperated position, its letter bar 20l isallowed to move to its left hand position under the tension of spring202 (left being toward the magnets I10). However, there is a slightamount of lost motion between selector levers 203 and letter bars 20!suflicient to permit end of selector lever 203 to be tripped ofi orbecome disengaged from the notch 205 of latch 206, permitting a veryslight counter-clockwise rotation of lever 203, thus rendering effectivethe action of spring 2M when selected letter bar 2M is permitted to moveby reason of the disengagement of locking blade 2M therefrom.

Incidentally, springs 207 are stronger than springs 202 associated with.letter bars 2!, because in moving the permutation bar to the right,spring 20? must overcome the action of spring 202. The sole purpose ofsprings 292 is to return the associated selector letter bar 2M to itsleft hand position after it is released by locking blade 26 i.

When a selector magnet ill! is energized, in the previously describedmanner, it attracts its armature which is secured to one arm of latch 2%and causes said latch to rotate slightly counter-clockwise (as viewed inFigure 3) about pivot 203 against action of its retractile spring 289.

"This movement of latch 206 permits its asso ciated selector lever 203to become unlatched therefrom, thereby allowing lever 203 to rotatecounter-clockwise about pivot 206 due to the action of its associatedspring Zill, thus permitting tension of spring 201 to be transferred toassociated bar 20H. This has no eiiect at this time, however, as eachbar Zill is locked by blade 2M, the operation of which will be describedhereinafter.

Located above permutation bars 2M and transversely thereof is a seriesof slidable stock bars 2'05. Stock bars M5 each have projections 266,and the letter bars have slots 2M3 co-acting selectively therewith.Slots 2 It and projections 26% in both cases are preferably equallyspaced on the bars. Each different stock bar has its projection 2E8 bentin a difierent arrangement of right and left hand positions, accordingto the permutations or letter code signals allotted to cause selectionof that stock bar. The lugs are bent to the right for operated letterbars and to the left for unoperated letter bars in such manner that ifthe letter bars 2M are set in accordance with the three letterpermutations or combinations allotted to a given stock bar, the stool;bar corresponding to this combination of letter signals and having itsprojections 255 bent in a corresponding manner will have each of itsprojections 2H6 aligned with a slot Zlfi' in the letter or selector barsand be permitted to operate selectively as described later.

Power for operating the stock selecting unit is supplied by a governedmotor 2i'l. Mounted on shaft 2W, which is rotatably connected to themotor shaft, are stop disc 2! and gears 220 and 22L Disc 259 isrotatably connected to shaft 2th by spring pressed friction clutch 222and is adapted to co-act with armature latch member 223 pivoted at 226.Gear 220 is adapted to mesh with corresponding gear 225 fixed totransversely disposed shaft 226. Rotatably fixed to shaft 226 is a balloperating cam 221, which is adapted to co-act with follower 228 carriedon bell-crank lever 229 pivoted at 230 to which lever one end ofreset-bail blade 23! is secured, the other end being likewise secured toa lever arm (not shown) pivoted on shaft 230. Reset bail blade 23l isadapted to span all individual selector levers 203. During apredetermined interval in the rotation of cam 231, lever 229 is releasedfor counter-clockwise rotation being so urged by tension spring 232.This counterclockwise motion of reset bail lever 229'imparts throughreset bail blade 231 clockwise rotation to all of the previouslyselected selector levers 203 so that said selector levers will againbecome latched at 205 by latches 208. Having reset selected levers 203,reset bail 23! is again returned to its clockwise position by cam 221.

Gear 22! is adapted to mesh with corresponding gear 233 fixed totransversely disposed shaft 234. Rotatably fixed to shaft 234 are cams235 and 236. Cam 235 is fashioned to co-act with a follower 231 carriedon a bell-crank lever 238 pivoted on shaft 239 to which lever one end oflocking blade 2H, previously alluded to, issecured; the other end beinglikewise secured to lever arm 248 also pivoted on shaft 239. Blade 2 isadapted to span all of the letter bars 20f and to cooperate with a pairof V-shaped notches in each letter bar, as will presently appear.

Cam 236 is adapted to cooperate with a follower 242 carried onbell-crank lever 243 pivoted on shaft 244 to which lever one end ofstock bar bail blade 245 is secured, the other end being likewisesecured to lever arm 246 also pivoted on shaft 264. Blade 245 is adaptedto span all of the stock bars 2l5 each of which is notched to havecooperative relation therewith.

The operation of the stock selector will now be described. It isunderstood that a stock selecting unit as shown will have stock bars 215corresponding to only a fraction of the total possible number ofpermutations of seventeen elements. In any particular case, any numberof these stock selecting units may be used in parallel and while all theunits will operate for each signal only one stock bar 2 IE will beselected in some one of the units by each diiferent setting orpermutation of bars 201. If a signal is received corresponding. to astock not represented on a particular board, no stock bar will beoperated for that board. It will also be noted that by removing any oneof the selector bars 2l5, another having a different combination of bentlugs 216, may be substituted thereby changing the stock selected in thatparticular position.

After the selected selector magnets I10 have become energizedsimultaneously by closing of contacts H69 by bail I56 in accordance withthe received code combinations to effect the selection of thecorresponding letter bars20i, the start magnet 119 has become energizedafter the completion of the price selection to attract its armature 223to effect the unlatching of said armature from disc 2| 9 to initiaterotation of shaft 218, and shafts 226 and 234.- The first eventthereafter is the oscillation of locking bar 211 by cam 235 through hellcrank 238 to permit the resetting of letter bars 201 in accordance withthe new combination. After letter bars 20l have again become locked intheir new position by return of bar 2 to its upper position, when bellcrank 238 leaves high portion of earn 235 reset bail 231 is oscillatedto effect the resetof the solenoid individual thereto.

ting or relatching of selector levers 203, as previously described.Thence bail 245 is oscillated by cam 236 through bell crank 243 topermit the selected stock bars 2I5 to move to the front or to the left(as viewed in Figure 3) under the action of its individual spring 241 tomomentarily close their associated contacts 248 to complete energizingcircuits for self-locking relay 249 from positive battery throughcontacts 249, over wires 25l, through windings of relay'249, over wire252, through winding of selected register solenoid 253, over commonreturn wire 254, through resistance 255, contact 256, to ground. Relays249 close their contacts 258 and complete their own locking circuitsfrom positive battery over armature 251, though contact 256 and windingof relay 249, thence over'wire 252 and the preceding traced circuit toground. Bail 2 returns to normal position when cam 236 rotates until alow'portion is beneath bell crank 243, thus returning the selected stockbar-to initial position and restoring the stock selector for the nextselection.

Although current passes through selected solenoid 253 it is not affectedat this time because it is marginal and does not operate until reralityof contacts, in this instance contacts 256 and 259, adapted to beoperated by suitable cams fixed to drive shaft 25!, power to which issupplied by a governed motor 252 throughfriction (or any suitable)clutch 253. Shaft 2 6l is normally restrained from rotation by theaction of armature latch 264, associated with start magnet I95, uponstop disc 255. C

When start magnet B95 is energized as previously described, immediatelyafter magnets E84 of price selector and magnets I10 of stock selectorhave been actuated, it attracts armature 264 to initiate rotation ofshaft 261. At a predetermined time cam 266 closes contact 259 whichshunts out resistance 255 and as a result thereof sufficient current issupplied to solenoid 253 to cause it to operate. The effct of theoperation of solenoid 253 will become apparent hereinafter.

Further rotation of shaft 251 allows contacts 256 to open when cam 260rotates to the point when the low portion thereof engages thesecontacts. Opening of contacts 256 de-energizes the selected stock magnet253, but this occurs after the price-selector has operated ashereinafter explained.

The face view of the stock unit is shown diagrammatically at 261 and 261which views are broken away to show the location and positionIncidentally wire 254 is common to one terminal of all individualsolenoids such as 253 and 253.

A detailed description of stock unit 261 will be given hereinafter, soit will be sufficient to say here that each stock unit comprisesessentially a frontmask provided with a plurality of rows Price selectorThe price selecting unit I85, Figure 4, comprises essentially aplurality of code disc selecting mechanisms 288, 289, 218 and 2", whichare adapted to be mounted at the foot of each column of stock units suchas 261 (see Figure 9) and which operate in accordance with the quotationcodes received to determine the angular rotation of the selectedindicator drums in this column, as will hereinafter appear;

The price selecting unit comprises motor 213, Figure 9, carrying on itsshaft 214 a worm gear 215 in meshing engagement with one of a pluralityof gears 218 which is carried on and rotates a cross shaft 211. Crossshaft 211 also carries an individual gear 218 for each of four shortvertical shafts 218, Figure 4. Each gear 216 meshes with a gear 219mounted on the corresponding vertical shaft 218 and adapted to drive itthrough a friction clutch 28I, of construction similar to clutch 83previously described.

Referring to Figure 5, showing one code disc selector mechanism indetail, it is noted that concentric with short shaft 218 is a series offour loosely mounted, spaced, notched code discs 385 carried betweenguide plates 283 and 284, and separated by annular discs 285 carried ona shaft engaging thimble 288. In the case of the fractions code discselector only three of the .code discs 282 are operative, the fourthremaining idle, due to the smaller number of variant code combinationsrequired for the fractions indication of the stock quotation, the idledisc being supplied to make the selector parts standard andinterchangeable. Each disc 385 is adapted to occupy one or the other oftwo positions to which it is moved by means of individual transferlevers 281, Figure 4, and Figure 7. Each group of four (or three in thefractions selector) transfer levers 281 is pivotally mounted on a commonstud at the end of one arm of an individual bell crank lever 289, theother arm of each bell crank lever 289 being pivotally connected to a.common link 298. Levers 289 are caused to oscillate due to the action ofcam 29I upon link 298 to effect shifting of code discs 385. As is noted,when start magnet I93 is energized at the proper time, as hereinbeforedescribed, it attracts its armature 292 to effect release of stop disc293 which is operably connected to cam 29I and which is also rotatablyconnected to shaft 294 by suitable friction clutch means (not shown).Constant rotative motion is imparted to shaft 294 by the motor 213 by atrain of gears (not shown) Thus when disc 293 and hence cam 29I arereleased for rotation, link 298 is cammed to the right (as viewed inFigure 4) against the action of retractile spring 298', which movementof link 298 imparts to bell crank levers 289 a clockwise motion, whichin turn imparts a downward movement to transfer levers 281.

Appropriately positioned to co-act with transfer levers 281 areindividual selector levers 295, Figure 4, and Figure 7, arranged inthree groups of four levers each and one group of three levers, for thefractions selector 21I as shown, which are pivotally mounted on commonpivots 296. Selector levers 295 are provided with abutments 291 and 298,Figure 7, adapted to cooperate with arms 38I and382 of transfer levers281. Integral with selector lever 295 and oppositely disposed toabutments 38I and 382 is armature 383, which is adapted to be attractedby its associated selector magnet I84.

Transfer levers 281 are adapted to go through two different movements,first a reciprocating movement in which the lever 281 is reciprocatedbodily due to the oscillation of bell cran'x lever is caused to rotatein a counter-clockwise sense (as viewed in Figure '1) thus presentingits. abutment 291 into cooperative relation with arm 38I of itsassociated transfer lever 281. v

Abutments 291 and 298 on 'the selector levers 295 (Figure 7) are spacedcloser together than the ends of the arms 38I and 382, so that as theselector lever 295 takes one'p'osition or the other in response toenergization and de-energlzation of selector magnets I84 due to thereceived electrical'conditions, abutments 291 and arm 38I are inblocking engagement when the transfer lever 281 is bodily oscillated,and at the same time the arm 382 moves freely past the abutment 298 andalternately, the abutment 298 may move into blocking .,engagement withits related arm 382, while the arm 38I moves freely past the abutment291. Due to the engagement of abutment 291 and arm 38I a clockwiserotation is imparted to transfer lever 281 about its pivot 384 as lever281 is bodily oscillated by bell crank 289; and reversely,

when the abutment 298 and 382 engage, a counter-clockwise rotation isimparted to transfer lever 281, as the latter is bodily oscillated.

This clockwise rotation of transfer lever 281 thus urges its associateddisc 385, through arm 386, to its counter-clockwise position.Conversely, de-energization of a selector magnet I84 will in a similarmanner cause rotation of its associated code disc 385 to its clockwiseposition. When the selector magnets I84 are de-energized, selectorlevers 295 associated therewith are held in the unoperated position bythe tension of springs 381, each of which springs, in the presentembodiment, is common to a pair of selector levers.

Arranged circumferentially around notched code discs 385 is a series ofspring pressed rods 388 (Figures 5, 6, and '1) carried in notches inguide plates 283 and 284, previously mentioned. A third guide plate 389is maintained in spaced relat on to plate 283 by a sleeve member 3I2 andtie bolts 3 I 3.

Rods 388 each carry a set of rollers 3 I 4 arranged opposite notches inthe code discs 385. The notches in the discs are so arranged that forevery combination of settings of the discs, a notch in each of the discsis in alignment with the notches in all other discs and the particularrod 388 which is opposite these aligned notches, will drop therein dueto pressure of coiled springs 3| I, encircling all rods 388.

These notches are substantially of V-shape so that when the discs arere-operated in accordance with a new code combination of impulses, theparticular rod which has previously dropped into the notches is cammedout and held on the outer circumferential edge of the discs. As a resultof the new alignment of the discs, rod 388 opposite the newly alignednotches drops therein.

Carried on each short shaft 218 of each selector mechanism, androtatable therewith, and adapted to cooperate with the ends of rods 388is stop arm 3I5, Figures 5 and 6. As arm 3I5 rotates, it may move freelypast the rods 388 held on the outer edge of the discs, out of thenotches. When, however, an alignment of notches occurs and one of therods 388 drops therein, its end shown in Figure 6 moves into the path ofthe arm 3I5 and brings the short shaft 218 to a stop

